CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM PRECAUTION


  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

    Note

    When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected Click here.

  2. IGNITION SWITCH EXPRESSION

    Tech Tips

    The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

    Expression Ignition Switch (Position) Engine Switch (Condition)
    Ignition Switch off LOCK Off (Lock)
    Ignition Switch ACC ACC On (ACC)
    Ignition Switch ON ON On (IG)
    Engine Start START On (Start)

  3. PRECAUTION

    Note


    • Perform reset memory when replacing the Continuously Variable Transaxle (CVT) assembly or ECM.

    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor zero point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor zero point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table Click here.

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Oil pressure sensor

      • Yaw rate sensor

    • If either of the following conditions is met, perform ATF Thermal Degradation Estimate Reset Click here.


      • The CVT fluid has been replaced.

        Tech Tips

        If 50000 or more is displayed for the Data List item "ATF Thermal Degradation Estimate", thermal degradation of the CVT fluid is suspected. Perform ATF Thermal Degradation Estimate Reset after replacing the CVT fluid.

      • Approximately 50% or more of the CVT fluid has been replaced during a repair of the transaxle or a similar operation.

  4. HANDLING PRECAUTIONS

    CAUTION:

    When using compressed air, always aim away from yourself to prevent CVT fluid from spraying on your face.

    Note


    • Before removing components from the transaxle, clean off any sand, dirt or other foreign matter present on the exterior of the transaxle. Make sure that foreign matter does not contaminate the inside of the transaxle when parts are removed or installed, or during disassembly and reassembly of the transaxle.

    • When disassembling light alloy parts such as the case, do not pry them with a screwdriver or similar tool. Instead, tap the parts with a plastic-faced hammer to separate them.

    • Do not wear cloth gloves or use cloth to handle parts during removal, disassembly, or installation of the transaxle. Instead, wear synthetic gloves to prevent cloth fiber from entering the transaxle.

    • Removed parts should be arranged in order and care should be taken to prevent dust contamination.

    • Apply Toyota Genuine CVT Fluid FE to all sliding surfaces and rotating parts.

    • Before installing O-rings and oil seal rings, coat them with Toyota Genuine CVT Fluid FE and be sure to not damage them.

    • Be careful to not damage the mating surfaces of components, because damage to these surfaces can cause oil leaks.

    • Before applying sealant, remove all of the old sealant and thoroughly clean the surfaces with non-residue solvent.

    • Use of Toyota Genuine CVT Fluid FE is recommended.

    • Do not subject parts such as sensors to any impacts. Replace parts with new ones if they are dropped or subjected to a severe blow.